The acronym for "Fake Sickness Syndrome"
FSS normally sets in Monday-Friday before 8am. FSS is used to get out of everyday task like Work & School etc..
Symptoms of FSS consist of: Fake fever, fake coughing, and of course fake vomiting. If you have any signs of FSS please, dont dispare hope is there.
Wayne: Yo Jose is Kendall at school today.
Jose: Nah man that nigga got FSS earlier this morning.